﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;

namespace Xceed.Silverlight.Data
{
  internal class SyncCachingDebugLogDataSourceEnumerator : SyncDebugLogDataSourceEnumerator, ICachingEnumerator
  {

    public SyncCachingDebugLogDataSourceEnumerator( ISyncDataSourceEnumerator childEnumerator )
      : base( childEnumerator )
    {
      SyncCachingDebugLogDataSourceEnumerator.CheckEnumerator( childEnumerator );
    }

    public SyncCachingDebugLogDataSourceEnumerator( 
      ISyncDataSourceEnumerator childEnumerator, 
      Action<string> logger )
      : base( childEnumerator, logger )
    {
      SyncCachingDebugLogDataSourceEnumerator.CheckEnumerator( childEnumerator );
    }

    private static void CheckEnumerator( ISyncDataSourceEnumerator childEnumerator )
    {
      if( !( childEnumerator is ICachingEnumerator ) )
        throw new ArgumentException( string.Format( "must implement {0}", typeof( ICachingEnumerator ).Name ), "childEnumerator" );
    }

    #region ICachingEnumerator Members

    public int CacheSize
    {
      get
      {
        int cacheSize = ( ( ICachingEnumerator )this.ChildEnumerator ).CacheSize;
        this.LogManager.LogSingle( "CacheSize_get", cacheSize );
        return cacheSize;
      }
    }

    public void SetCacheSize( int size )
    {
      this.LogManager.LogBefore( "SetCacheSize", size );
      ( ( ICachingEnumerator )this.ChildEnumerator ).SetCacheSize( size );
      this.LogManager.LogAfter( "SetCacheSize", size );
    }

    public void SetCacheSize( int size, double topTrimRatio )
    {
      this.LogManager.LogBefore( "SetCacheSize", size, topTrimRatio );
      ( ( ICachingEnumerator )this.ChildEnumerator ).SetCacheSize( size, topTrimRatio );
      this.LogManager.LogAfter( "SetCacheSize", size, topTrimRatio );
    }

    public void SetCacheSize( int size, SourcePosition topTrimLimit )
    {
      this.LogManager.LogBefore( "SetCacheSize", size, topTrimLimit );
      ( ( ICachingEnumerator )this.ChildEnumerator ).SetCacheSize( size, topTrimLimit );
      this.LogManager.LogAfter( "SetCacheSize", size, topTrimLimit );
    }

    #endregion
  }
}
